Wireless power transmitting apparatus

Abstract

A wireless power transmitter according to one exemplary embodiment of the present disclosure includes a body having a transmitting coil unit embedded therein, and having one surface with a portable electronic device located thereon, the portable electronic device receiving power from the transmitting coil unit in a wireless manner, and a driving unit that is configured to rotate the transmitting coil unit centering on a shaft penetrating through the transmitting coil unit, such that the transmitting coil unit is moved close to a receiving coil unit of the portable electronic device.

The invention claimed is: 
     
       1. A wireless power transmitter comprising:
 a body having a transmitting coil unit embedded therein, and having one surface with a portable electronic device located thereon, the portable electronic device receiving power from the transmitting coil unit in a wireless manner; and 
 a driving unit that is configured to rotate the transmitting coil unit centering on a shaft penetrating through the transmitting coil unit, such that the transmitting coil unit is moved close to a receiving coil unit of the portable electronic device, 
 wherein the body has at least part formed transparent such that the transmitting coil unit is visible therethrough. 
 
     
     
       2. The wireless power transmitter of  claim 1 , further comprising a sensing unit that is configured to sense a position of the receiving coil unit. 
     
     
       3. The wireless power transmitter of  claim 2 , wherein the sensing unit comprises:
 a substrate having one surface divided into a plurality of areas; and 
 sensing coils disposed on the areas, respectively. 
 
     
     
       4. The wireless power transmitter of  claim 3 , further comprising a controller that is configured to transmit a control signal to the driving unit based on a signal received from each of the sensing coils. 
     
     
       5. The wireless power transmitter of  claim 4 , wherein the controller transmits the control signal to the driving unit at a preset time interval based on the signal received from each of the sensing coils to maintain charging efficiency more than a predetermined level. 
     
     
       6. The wireless power transmitter of  claim 1 , wherein the body further comprises a display configured to output a level of charging efficiency. 
     
     
       7. The wireless power transmitter of  claim 1 , wherein the shaft comprises a cavity, through which a conducting wire is inserted, the conducting wire connecting the transmitting coil unit and an inverter to each other. 
     
     
       8. The wireless power transmitter of  claim 1 , wherein the shaft is located at a position spaced from a center of the transmitting coil unit. 
     
     
       9. The wireless power transmitter of  claim 8 , wherein the transmitting coil unit has a cross-section in an oval shape. 
     
     
       10. The wireless power transmitter of  claim 1 , further comprising a first coil connected to an inverter,
 wherein the transmitting coil unit comprises a second coil receiving induced power from the first coil. 
 
     
     
       11. The wireless power transmitter of  claim 1 , wherein the transmitting coil unit is configured in such a manner that an impedance value thereof is changed according to positions of the receiving coil unit and the transmitting coil unit, and
 wherein the transmitter further comprises a controller that is configured to transmit a control signal to the driving unit such that the impedance value is present within a preset range.